COOLANT SYSTEM
Seawater Pump Components and Functions
7-8
6LY3 Service Manual
© 2007 Yanmar Marine International
Assembling the Seawater Pump
1. When replacing the mechanical seal, coat the
sliding surface with a good quality silicon oil. Do
not scratch any surfaces.
2. Coat the lip seal with grease and insert.
3. Install the pump shaft, ball bearing and gear
assembly to the pump unit and secure the
bearing stop ring.
NOTICE: Coat the shaft with
grease before installing.
4. Install the O-ring.
5. Install the pump drive gear and retighten the
pump drive gear nut to the specified torque.
6. After inserting the mechanical seal, install the
wear plate and impeller.
7. Coat the inside of pump body impeller housing
with grease.
8. Insert the impeller
(Figure 7-6, (2))
into the
pump body. See
Figure 7-6, (1)
for impeller
rotation. Impeller threads are toward the cover.
Figure 7-5
Figure 7-5
1 – Cover
Figure 7-6
Figure 7-6
1 – Impeller Rotation
2 – Impeller
9. Install the O-ring between the pump body and
end cover.
Pump Drive Gear Nut Torque
73-83 N·m (53-61 lb-ft)
0006204
(1)
0006205
(1)
(2)
